If you are found to be eligible to take part in this study, you will take erlotinib every day for 7 weeks (except on the days you receive chemotherapy). The erlotinib tablets should be taken at the same time each day, at least 1 hour before or 2 hours after a meal, with a small glass (about 7 ounces) of water. If you are unable to swallow tablets, you may dissolve the tablets in distilled water to drink.